Classifications

• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D499/00—Heterocyclic compounds containing 4-thia-1-azabicyclo [3.2.0] heptane ring systems, i.e. compounds containing a ring system of the formula:, e.g. penicillins, penems; Such ring systems being further condensed, e.g. 2,3-condensed with an oxygen-, nitrogen- or sulfur-containing hetero ring
  • C07D499/21—Heterocyclic compounds containing 4-thia-1-azabicyclo [3.2.0] heptane ring systems, i.e. compounds containing a ring system of the formula:, e.g. penicillins, penems; Such ring systems being further condensed, e.g. 2,3-condensed with an oxygen-, nitrogen- or sulfur-containing hetero ring with a nitrogen atom directly attached in position 6 and a carbon atom having three bonds to hetero atoms with at the most one bond to halogen, e.g. an ester or nitrile radical, directly attached in position 2
  • C07D499/44—Compounds with an amino radical acylated by carboxylic acids, attached in position 6
  • C07D499/48—Compounds with an amino radical acylated by carboxylic acids, attached in position 6 with a carbon chain, substituted by hetero atoms or by carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, attached to the carboxamido radical
  • C07D499/58—Compounds with an amino radical acylated by carboxylic acids, attached in position 6 with a carbon chain, substituted by hetero atoms or by carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, attached to the carboxamido radical substituted in alpha-position to the carboxamido radical
  • C07D499/64—Compounds with an amino radical acylated by carboxylic acids, attached in position 6 with a carbon chain, substituted by hetero atoms or by carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, attached to the carboxamido radical substituted in alpha-position to the carboxamido radical by nitrogen atoms
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D499/00—Heterocyclic compounds containing 4-thia-1-azabicyclo [3.2.0] heptane ring systems, i.e. compounds containing a ring system of the formula:, e.g. penicillins, penems; Such ring systems being further condensed, e.g. 2,3-condensed with an oxygen-, nitrogen- or sulfur-containing hetero ring
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
  • C08G12/00—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen
  • C08G12/02—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes
  • C08G12/04—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes with acyclic or carbocyclic compounds
  • C08G12/10—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes with acyclic or carbocyclic compounds with acyclic compounds having the moiety X=C(—N<)2 in which X is O, S or —N
  • C08G12/12—Ureas; Thioureas

Definitions

• This invention relates to new penicillins and is particularly concerned with a new class of penicillins which are derivatives of 6-aminopenicillanic acid and which are of value as antibacterial agents, as nutritional supplements in animal food, as agents for the treatment of mastitis in cattle and as therapeutic agents in poultry and animals, including man, in the treatment especially of infectious diseases caused by Gram-positive and Gramnegative bacteria.
• R is an alkyl, aralkyl, aryl or heterocyclic group which may be substituted and X is a direct linkage or a divalent aliphatic, aromatic or heterocyclic radical which may be substituted.
• the salts are non-toxic salts including non-toxic metallic salts such as sodium, potassium, calcium and aluminum, ammonium and substituted ammonium salts, e.g. salts of such non-toxic amines as trialkylamines, including triethylamine, procaine, dibenzylamine, N-benzylbeta-phenethylamine, l-ephenamine, N,N'-dibenzylethylenediamine, dehydroabietylamine, N,N' bis-dehydr0 abietylethylenediamine, and other amines which have been used to form salts with benzylpenicillin.
• non-toxic metallic salts such as sodium, potassium, calcium and aluminum
• ammonium and substituted ammonium salts e.g. salts of such non-toxic amines as trialkylamines, including triethylamine, procaine, dibenzylamine, N-benzylbeta-phenethylamine, l-ephen
• the new penicillins of the present invention may be prepared by reacting an u-aminopenicillin of the general formula:
• a reactive derivative of the dicarboxylic acid HOOCXCOOH where R and X are as hereinbefore defined.
• suitable reactive derivatives include the cyclic anhydrides the monoand bis-acid chlorides and the monoand bismixed anhydrides.
• the new penicillins may be prepared by the catalytic hydrogenation of an intermediate penicillin (III) containing a protected carboxyl group where R is a benzyl or substituted benzyl group and R and X are as hereinbefore defined.
• the intermediate or protected penicillin (III) is prepared either by reacting the a-aminopenicillin (II) with a reactive derivative of the acid ROOCXCOOH 3,320,240 Patented May 16, 19167 (IV) or by reacting 6-aminopenicillanic acid with a reactive derivative of the acid ROOO-XCONHCHOOOH 1'1 (v)
• Such reactive derivatives of the acids (IV) and (V) include the chlorides, bromides, azides, anhydrides, mixed anhydrides, and the intermediates formed from the acids and a condensing agent as dicyclohexylcarbodiimide or carbonyldiimidiazole.
• novel penicillins of the present invention are mostly capable of existing in two epimeric forms and it is to be understood that the invention includes both the D- and L-forms as Well as the DL-mixture.
• EXAMPLE 1 Sodium 6 [D-a- (o-carboxybenzamido ph enylacetamido'] penicillanate A solution of phthalic anhydride (3 g.) in methylene dichloride (25 ml.) was added slowly with stirring to a chilled solution prepared from anhydrous 6[D()-oc aminophenylacetamido]penicillanic acid (7 g.), methylene dichloride (50 ml.), and triethylamine (8.4 ml.). The mixture was stirred at room temperature for 2 /2 hours, then diluted with dry ether until formation of an oily precipitate appeared to be complete.
• the aqueous solution was covered with methyl isobutyl ketone (25 ml.) and treated with dilute hydrochloric acid to pH 1.5 with stirring.
• the layers were separated and the solvent phase, which contained the free acid form of the required penicillin, was washed with water (2X 20 ml.) and then with saturated brine (25 ml.).
• the precipitate was collected and washed first with methyl isobutyl ketone, then with dry ether, and dried in a vacuum desiccator.
• the product (4.3 g.) was estimated by colorimetric assay with hydroxylamine to be 69% pure. When subjected to paper chromatography it gave a single zone of antibacterial activity having a different R value from that of the starting penicillin.
• EXAMPLE 2 Sodium 6 [D-u- (,B-carboxypropionamido)phenylacetamido] penicillanate Sodium 6 [D-u- (B-carbOxytlcry lamido) ph enylacetamiao] penicillanate
• the experiment described in Example 1 was repeated, except that the phthalic anhydride reagent was replaced by maleic anhydride (2 g.) dissolved in dioxane (30 ml.).
• EXAMPLE 5 Sodium 6[a-(ii-carboxypropionamido)-2-fu1ylacetamid0] penicillanate This penicillin was prepared as described in Example 2 but starting with 6(u-amino-2-furylacetamido)penicillanic acid instead of 6[D()u-aminophenylacetamido] penicillanic acid.
• EXAMPLE 6 Sodium 6 [D-u-('y-carboxybutyramido) phenylacetamido] penicillanate A solution of glutaric anhydride (2.3 g.) in tetrahydrofuran (50 ml.) was added to a stirred solution of 6[D oz aminophenylacetamido]penicillanic acid trihydrate (8.06 g.) and triethylamine (2.84 ml.) in Water 50 ml.). The solution was stirred for 2 hours at room temperature and the pH maintained at 7 to 7.5 by additions of triethylamine. The reaction mixture was evaporated ot a half volume at reduced pressure and temperatures below 20 C.
• the product (9.2 g.) was estimated by manometric penicillinase assay to be 71% pure. When subjected to paper chromatography it gave a single zone of antibacterial activity having a diiferent R value from that of the starting penicillin.
• EXAMPLE 7 Sodium 6 [D-oc- (carboxymethoxyacetamido) phenylacetamid01penicillanate The experiment described in Example 6 was repeated, except that the glutaric anhydride was replaced by diglycolic anhydride (2.32 g.).
• EXAMPLE 9 Sodium 6[D-u-(3-carboxypyrazine-2-carbamido) phenylacetamido]penicillanate
• pyrazine-2,3-carboxyanhydride (3.0 g.) was used instead of phthalic anhydride.
• the yield of the sodium salt of the resulting penicillin was 6.9 g.; and the purity was estimated by manometric penicillinase assay as 74%.
• a sample when submitted to paper chromatography showed a single zone of antibiotic activity.
• EXAMPLE 1 1 Sodium 6 [D a-(o-carboxyphenylacetamido)phenylacetamido]penicillanate and sodium, 6[D a (o-carb0xy methylbenzamido) phenylacetamido] penicillanate
• homophthalic anhydride 1.6 g.
• the yield of the mixed penicillins, as crude sodium salts was 2.8 g.
• EXAMPLE 12 Sodium 6 [D-a-(m-carboxybenzamido) phenylacetamido] penicillanate A solution of isophthaloyl chloride (2.0 g.) in methyl isobutyl ketone (50 ml.) was added in a thin steady stream to a vigorously stirred aqueous solution of 6[D a aminophenylacetamido]penicillanic acid trihydrate (4.0 g.), water (50 ml.) and triethylamine (1.4 ml.). After stirring at room temperature for 2 hours, the phases were separated and the organic phase washed with water (3X 50 ml.) followed by saturated brine solution (2X 50 ml.).
• the sodium salt of the penicillin was then precipitated by adding a 2 N solution of sodium 2-ethyl hexoate in methyl isobutyl ketone.
• the precipitate was collected and washed first with methyl isobutyl ketone, then with dry ether, and dried in a vacuum desiccator.
• the product (3.1 g.) was estimated by colorimetric assay with hydroxylamine to be 83% pure. When subjected to paper chromatography it gave a single zone of antibacterial activity.
• EXAMPLE 13 Sodium 6[D-a-(5-carboxypyraz0ne-3-carbamido) phenylacetamido] peuicillanate
• pyrazole-3,S-di-carboxychloride 1.9 g.
• the yield of the sodium salt of the resulting penicillin was 2.5 g.; the purity was estimated by manometric penicillinase assay to be 83%.
• manometric penicillinase assay When subjected to paper chromatography it gave a single zone of antibacterial activity.
• EXAMPLE 14 Sodium 6 [D-a-(2-carboxy-3-nitrobenzamido) phenylacetamido] penicillanate The experiment in Example 1 was repeated except that 3 nitro phthalic anhydride (3.8 g.) was used instead of phthalic anhydride. The yield of the sodium salt of the resulting penicillin was 1.4 'g., the purity was estimated by colorimetric assay with hydroxylamine to be 66%.
• EXAMPLE 15 Sodium 6 [L-a- ,B-carboxyacrylamido) -m-hydrcxyphenylacetamido1penicillanate
• maleic anhydride 0.5 g.
• 6[L(+)-a-amino-m-hydroxyphenylacetamido]penicillianic acid 1.8 g.
• 6[D()-a-aminophenylacetamido]penicillanic acid When subjected to paper chromatography the product gave a single zone of antibacterial activity.
• EXAMPLE 17 Sodium 6[D-ot-(carboxycarbamido)phenylacetamido] penicillanate A solution of oxalyl chloride (25 ml.) in dry toluene (80 ml.) was stirred vigorously at -10 to 5 whilst a solution of benzyl alcohol (27.7 ml.) in dry toluene (20 ml.) was added dropwise. The mixture was then stirred without external cooling for 2 hours, clarified by filtra tion, and the filtrate concentrated under reduced pressure (bath temperature 80) to a volume of 70 ml.
• the layers were then separated and the aqueous phase was covered with isobutyl methyl ketone (25 ml.). Sufficient N hydrochloric acid was added to bring the aqueous phase, after shaking, to pH 2. The layers were then separated and a second solvent extraction was performed in similar fashion. The combined solvent extracts were washed with water (4X 100 ml.) and then with saturated brine (2X 100 ml), and filtered through a siliconised filter paper. The clarified solution was added dropwise with vigorous stirring to 1.51 of a 0.033 N solution of sodium Z-ethylhexoate in ether.
• EXAMPLE 18 Sodium 6 [D-a-(carboxyacetamido) phenylacetamido] penicillanate Monobenzyl malonate (5.82 g., M.P. 5051) and thionyl chloride (5 ml.) were warmed together at 80 for 1 hour, then volatile matter was removed under reduced pressure (bath temperature 70). The residual oily acid chloride was dissolved in isobutyl methyl ketone (5 0 ml.) and added in one portion to a vigorously stirred solution of 6[D() -a-aminophenylacetaruido]penicillanic acid trihydrate (12.1 g.) in 0.6 N aqueous sodium hydroxide (50 ml.).
• R is alkyl of 1 to 6 carbon atoms, phenyl, hydroxyphenyl, thienyl, fury], hydroxyphenylakyl, phenylalkyl, furfuryl or thenyl and X is selected from the group consisting of a direct linkage, divalent alkyl of 1 to 6 carbon atoms,

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Citations (2)

• 0
  • BE BE669198D patent/BE669198A/xx unknown
• 1964
  • 1964-09-03 GB GB36206/64A patent/GB1057697A/en not_active Expired
• 1965
  • 1965-08-12 BR BR172075/65A patent/BR6572075D0/pt unknown
  • 1965-08-17 US US480477A patent/US3320240A/en not_active Expired - Lifetime
  • 1965-08-19 AT AT765665A patent/AT262506B/de active
  • 1965-08-20 NL NL6510974A patent/NL6510974A/xx unknown
  • 1965-09-02 FR FR30223A patent/FR5118M/fr not_active Expired
  • 1965-09-03 CH CH1233465A patent/CH456597A/de unknown
  • 1965-09-03 DK DK453365AA patent/DK124827B/da unknown
  • 1965-09-03 ES ES0317079A patent/ES317079A1/es not_active Expired
  • 1965-10-03 SE SE11536/65A patent/SE348738B/xx unknown

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